Device for conveying sheets of paper



NOV. 17, 1942. G SPlESS 2,302,067

DEVICE FOR CONVEYING SHEETS OF PAPER Filed Sept. 6, 1940 H jg! /n ven/or @7 By @wif/M,

Al/'orney Patented Nov. 17, 1942 DEVICE FOR CONVEYING SHEETS OF PAPER i Georg Spiess, Leipzig, Germany; vested in the Alien Property Custodian Application September 6, 1940, Serial No. 355,657

3 Claims.

The invention relates to a conveying device for feeding, rhythmically or not, single or overlapping sheets of paper, paste board, card board or sheet metal and other sheet-like material in or into a machinefor folded, printed or other sheets. This conveying device consists of a conveying table with circulating endless bands, an oblique drive with press bodies which bear freely movable on the oblique driving rollers of the oblique drive, and of a directing ruler on which the sheets or the like are adjusted and run with their adjusted edge along this directing ruler moved towards the working machine.

The invention has for its object, to simplify and cheapen such a conveying device which besides presents the advantage that a perfect adjusting and conveying of the sheets along the directing ruler is ensured and-further that an easy access to the interior of the machine is possible, for instance for the adjusting or eX- changing of the tools.

For feeding sheets or the like from the layeron into or within a machine for folded, printed or other sheets, conveying tables are generally used which are equipped on the whole length with a greater number of positively interconnected, driven oblique driving rollers and with a directing ruler. One press body, such as a ball brush wheel or the like, bears on each oblique driving roller closely in front of the directing ruler. These conveying tables with oblique rollers are very heavy; the rollers revolving at high speed cause much noise and are submitted to rapid wear. These conveying tables with oblique rollers further have the inconvenience that the sheet coming from the pile of sheets is driven against the directing ruler so that the corner of the sheet, which is the front corner in the conveying direction, comes first into contact with the directing ruler owing to the oblique drive, this leading often to a bending of this corner whereby, for instancejn an upsetting-folding machine misfoldings are caused.

These conveying tables with oblique rollers are not only very heavy but have also a complicated drive so that they cannot be swung upwards. It is consequently necessary to creep under the table in order to get at the interior of the machine, for instancev to carry out in an upsettingfolding machine the necessary manipulations on the folding mechanisms, such as cleaning and adjusting of the folding rollers, adjusting of the folding pockets, and the like.

All these inconveniences of the conveying shown in Fig. 1.

tables with oblique rollers are cbviated by the present invention.

A form of construction of the conveying device according to the invention is illustrated by way of example in the accompanying drawing as sheet feeding to an upsetting-folding machine, and only the elements material for theinvention are shown for clearness sake.

Fig. 1 shows in top plan view the device in connection with an upsetting-folding machina' the incoming sheet having not yet reached the oblique drive,

Fig. 2 is a similar top plan view but shows the incoming sheet in the position in which its front edge has come under the influence of the oblique drive )and consequently the rear endof the sheet comes first to bear against the directing ruler,

Fig. 3 is `a cross-section in longitudinal direction.

The sheets taken from the pile are deposited in the direction of the arrow A on a conveying table which consists of endless bands 3 circulating round the rollers I and 2. The roller I is driven, whereas the roller 2 is revolved by the bands 3. On one side of this conveying table a directing ruler 4 is-mounted. The sheets 5 are conveyed on the conveying table parallel or almostfparallel to the directing ruler 4, as An oblique drive, consisting of several short obliquely journaled rollers I6, I1, I3 and I9, is arranged between the conveying table and the treating machine, for instance an upsetting-folding machine comprising the folding rollers 6, 1, 8, 9, I0, II and the folding pockets I2, I3, I4 and I5. These oblique rollers are arranged near the directing ruler 4, and their apexes are at the same height as the upper edge of the bands 3, so that the sheets 5 are deposited in the `same plane on to the oblique drive. The rollers I6 to I9 are positively connected the one with the other by toothed wheels and driven from the drive of the upsetting-folding machine. A press body, for instance a ball 2i), is provided on each of the oblique rollers I6 to IS and located freely movable in a cage which rests on the apex of the corresponding roller. The balls sit on the rollers at a certain distance from the directing ruler 4.

The oblique drive consisting of short oblique rollers IE, I'I, I8, I9 and of the balls 20 is connected with the frame wall 2I of the upsettingfolding machine, for instance on a bracket 2lu so that the oblique drive forms, so to say, par of the upsetting-folding machine.

The circulating speed of the rollers I 3 to I9 positively driven by the folding machine is slightly greater than that of the continually circulating bands 3, the roller f of which is driven in known manner by a separate gear not shown.

In the space in front of the oblique driving rollers I6, Il, I8, I9, between the conveying bands 3 and the upsetting-folding machine or the folding rollers 6, 1 of the same, a bridge 22 is provided which has roof-like ribs 22a. lIhe top edges of these roof-like ribs 22a of bridge 22 are in the same plane as the upper surface of the conveying bands 3 and the apexes of the oblique rollers I5 to I9. The'` bridge 22*` is arranged so that it canbe removed. The roof-like ribs 22a present the advantage, that the sheets 5 are only in linear Contact with the bridge 22, so that very little friction resistance hasV to be overcome when the sheets are conveyed into the preparing machine, so that smearing of the sheets is avoided.

The conveying bands 3 compriseV a table plate of wood, composed of a solid partV 23 and of a movable part 24, The two parts 23 and 24 are connected the one with the other by hinges 25. The part 24 can be swung up about these hinges. In the operative position the front edge of part 24 bears against the wall 2Ia of the frame 2| of the upsetting-folding machine. The guide roller 2 for the bands 3 is journaled on the part 24 of the table so that, when the table part 24 is lifted, the conveying bands 3 are also lifted, aswshown in Fig. 3 in dash-lines. v

The sheets pulled off the pile move in the direction of the arrow A on to the bands 3 and are conveyed by them in the direction of the arrow A (invFig. 2) on to the oblique driving rollers I6 to I9. On the bands 3, the sheets are lying not yet adjusted and at a certain distance from the directing ruler 4. As soon as the front corner of the sheet '5 arrives on the oblique roller IS which revolves at somewhat higher speed, the front corner comes into Contact with the ball resting on this roller and engages under this ball, a turning movement is imparted to the sheet 5 additionally to its forward movement, so that its corner, which is the rear one in the conveying direction, is brought into contact with the directing ruler 4, as shown in Fig. 2. Also the front corner of the sheet is brought into contact with the directing ruler and accurately adjusted by the other oblique driving rollers I1 to I9 and by their balls 20. The sheet moves then along the directing ruler in accurately adjusted position over the bridge 22 into the upsetting-folding machine, the balls 28 securing it in the adjusted position. As the rear corner of the sheet cornes first into contact with the directing ruler, bending of the front corner cannot occur anymore and misfoldings are thus avoided.

If an alteration in the adjusting of the folding rollers or of the folding pockets of the upsettingfolding machine has to be carried out or if for Yother reasons access to the interior of the upsetting-folding machine is necessary, the part 24 of the conveying table with its band 3 and the roller 2 is lifted into the position shown in dot lines in Fig. 3. The bridge is then removed and the interior of the machine is freely accessible.

I claim:

l. A conveying device for feeding rhythmically or not rhythmically single or overlapping sheets of paper or similar material into or in a sheet folding machine, comprising in combination a conveying table in front of the folding machine said table consisting of a fixed part at the outer end and of a liftable part hingedly mounted on the inner end of said fixed part, a driven roller below the outer end of said fixed part, a roller journaled in said hinged table part, endless bands extending over said driven roller and said journaled roller, a directing ruler extending at the side of said conveying table to near the sheet folding machine, a bridge between said sheet folding machine and said conveying table, oblique driving rollers at the side of said bridge and. below the end of said directing ruler, and heavy balls one on each of said oblique driving rollers for guiding the front. corner of the conveyed sheet so that the rear corner of this sheet bears against said directing ruler.

2. In a conveying device as specied in claim l, means for revolving the oblique rollers for moving the sheet at a greater speed than the circulating speed of the endless bands.

3. A conveying device as specified in claim l, comprising a bridge between the conveying table and the folding mechanism, ribs of triangular cross-section on said bridge the pointed upper ends of said ribs being situated in the same plane as the top surface of said conveying table and as the apcxes of the oblique driving rollers.

GEORG SPIESS. 

